On March 13, 2020, this report was posted online as an MMWR Early Release. Yixiang Ng, MSc1*; Zongbin Li, MBBS1*; Yi Xian Chua, MSc1; Wei Liang Chaw, MSc1; Zheng Zhao, MSc1; Benjamin Er, MSc1; Rachael Pung, MSc1; Calvin J.
Chiew, MPH1; David C. Lye, MBBS2,3,4,5; Derrick Heng, MPH1; Vernon J. Lee, PhD1,6* (View author affiliations) First detected in China in late 2019, coronavirus disease 2019 (COVID-19) transmission has spread globally.
Singapore implemented a multipronged surveillance and containment strategy that contributed to enhanced case ascertainment and slowing of the outbreak.
Based on review of the first 100 cases, the mean interval from symptom onset to isolation was 5.6 days and declined after approximately 1 month.